Why would natural selection favor the development of the rattlesnake’s rattle?

What is the difference between muscular strength and muscular endurance? a. strength refers to mobility of joints, while endurance refers to muscular force. b. strength refers to percentage of body fat, while endurance refers to sustaining activity over time. c. strength refers to muscular force, while endurance refers to sustaining activity over time. d. strength refers to the quality of physical performance, while endurance refers to mobility of joints.

Ab+cd-> ad+bc is what kind of reaction

Which of these gives the best indication that a health service is based on pseudoscience?